docs: def wait_for_compactions(self, timeout=120):
          """
          Wait for all compactions to finish on this node.
          """
          pattern = re.compile("pending tasks: 0")
          start = time.time()
          while time.time() - start < timeout:
              output, err, rc = self.nodetool("compactionstats")
              if pattern.search(output):
                  return
              time.sleep(1)
          raise TimeoutError("{} [{}] Compactions did not finish in {} seconds".format(time.strftime("%d %b %Y %H:%M:%S", time.gmtime()), self.name, timeout))